1. Read http://www.tomshardware.com/reviews/best-graphics-card,2464.html
But your old card isn't that bad. It's really a great card.
2. The PCIE 2.0 card in an 1.0 slot is answered. This is supposed to be a NON-ISSUE and just work.
The video card on my three year old system failed a few days ago and I'm looking for a replacement.
This is my motherboard:
It has 2 x PCI Express x16 slot with NVIDIA SLI support, at full x16, x16 speed. I assume it is PCIe v1.0 since I bought it in late 2006.
This is my old video card:
It has PCI Express x16 and 1GB GDDR3
I notice that a lot of new video cards are PCIe v2.0. I assume my motherboard won't support v2.0 features but should it at least work with these new cards?
What else should I be aware of?